Information processor, signal format changing method, program, and image display apparatus

Abstract

Disclosed herein is an information processor including: a reception processing portion generating an information signal by executing reception processing for an input signal, and changing a signal format of the information signal being currently outputted over to a different signal format in accordance with a change instruction, thereby outputting the information signal having the different signal format to an external unit; and a control portion receiving the information signal outputted from the reception processing portion, and sending the change instruction to the external unit executing signal processing for the information signal having a signal format adapted to be processed by the external unit itself when the signal processing is not normally executed and generation of a signal processing error is recognized.

What is claimed is: 
     
         1 . An information processor comprising:
 a reception processing portion generating an information signal by executing reception processing for an input signal, and changing a signal format of the information signal being currently outputted over to a different signal format in accordance with a change instruction, thereby outputting the information signal having the different signal format to an external unit; and   a control portion receiving the information signal outputted from the reception processing portion, and sending the change instruction to the external unit executing signal processing for the information signal having a signal format adapted to be processed by the external unit itself when the signal processing is not normally executed and generation of a signal processing error is recognized.   
     
     
         2 . The information processor according to  claim 1 , wherein
 the reception processing portion executes processing to detect a transmission error generated in a transmission path of the input signal, thereby informing the control portion of a detection result; and   when the control portion is not informed of the detection of the transmission error and recognizes the generation of the signal processing error, the control portion considers the signal format of the information signal being outputted from the reception processing portion and the signal format adapted to be processed in the external unit to be a mismatch, and sends the change instruction, thereby matching the signal format of the information signal being outputted from the reception processing portion and the signal format adapted to be processed in the external unit each other.   
     
     
         3 . The information processor according to  claim 1 , wherein when the number of times of generation of the signal processing error reaches a predetermined number of times, the control portion sends the change instruction. 
     
     
         4 . A signal format changing method comprising:
 executing reception processing for an input signal to generate an information signal, thereby outputting the information signal thus generated to an external unit executing signal processing for the information signal having a signal format adapted to be processed by the external unit itself;   generating a change instruction when the signal processing is not normally executed in the external unit and generation of a signal processing error is recognized; and   changing the signal format of the information signal being currently outputted over to a different signal format in accordance with the change instruction.   
     
     
         5 . A program causing a computer to execute:
 reception processing for an input signal to generate an information signal, thereby outputting the information signal thus generated to an external unit executing signal processing for the information signal having a signal format adapted to be processed by the external unit itself;   generating a change instruction when the signal processing is not normally executed in the external unit and generation of a signal processing error is recognized; and   changing the signal format of the information signal being currently outputted over to a different signal format in accordance with the change instruction.   
     
     
         6 . An image display apparatus comprising:
 a demodulating portion executing processing to demodulate a modulated signal containing therein encrypted image information to generate a demodulated signal, and changing a signal format of the demodulated signal being currently outputted over to a different signal format in accordance with a change instruction, thereby outputting the demodulated signal having the different signal format to an external unit;   a control portion receiving the demodulated signal outputted from the demodulating portion, and sending the change instruction to the external unit decrypting the demodulated signal having a signal format adapted to be processed by the external unit itself when it is recognized that the decryption is not normally carried out;   an image processing portion executing image processing for an output signal from the external unit; and   a display portion displaying thereon an image after the image processing.   
     
     
         7 . The image display apparatus according to  claim 6 , wherein
 the demodulating portion executes processing to detect a transmission error generated on a transmission path of the modulated signal, thereby informing the control portion of a detection result;   the image processing portion executes processing to detect an image processing error, thereby informing the control portion of a detection result; and   when the control portion is not informed of the detection of the transmission error and is informed of the detection of the image processing error, the control portion considers the signal format of the demodulated signal being outputted from the demodulating portion and the signal format adapted to be processed in the external unit to be a mismatch, and sends the change instruction, thereby matching the signal format of the demodulated signal being outputted from the demodulating portion and the signal format adapted to be processed in the external unit each other.   
     
     
         8 . The image display apparatus according to  claim 7 , wherein when the number of times of information of the image processing error reaches a predetermined number of times, the control portion sends the change instruction.